40494090 has 144 divisors (see below), whose sum is σ = 123169248. Its totient is φ = 8491392.

The previous prime is 40494071. The next prime is 40494109. The reversal of 40494090 is 9049404.

It is an interprime number because it is at equal distance from previous prime (40494071) and next prime (40494109).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 248349 + ... + 248511.

It is an arithmetic number, because the mean of its divisors is an integer number (855342).

Almost surely, 2^40494090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40494090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61584624).

40494090 is an abundant number, since it is smaller than the sum of its proper divisors (82675158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40494090 is a wasteful number, since it uses less digits than its factorization.

40494090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 40494090 is about 6363.4966802851. The cubic root of 40494090 is about 343.3975676048.

The spelling of 40494090 in words is "forty million, four hundred ninety-four thousand, ninety".